Lens holder having air escape hole, camera module, and electronic device

Abstract

A lens holder with an air escape hole which cannot be fouled by adhesive includes a holder body and a lens barrel disposed on the holder body. The holder body includes a first surface away from the lens barrel and a second surface opposite to the first surface, the first surface defines a groove. The groove includes a first bottom surface, the first bottom surface defines a recess. The recess includes a second bottom surface, the second bottom surface defines an air escape hole. A cross-sectional size of the air escape hole is less than a cross-sectional size of the recess.

What is claimed is: 
     
       1. A camera module, comprising:
 a lens holder, comprising:
 a holder body; and 
 a lens barrel disposed on the holder body; 
 
 an adhesive layer; and 
 an optical filter connected to the holder body through the adhesive layer, 
 wherein the holder body comprises a first surface away from the lens barrel and a second surface opposite to the first surface, the first surface defines a groove, the groove comprises a first bottom surface, the first bottom surface defines a recess, the recess comprises a second bottom surface, the second bottom surface defines an air escape hole; 
 wherein a cross-sectional size of the air escape hole is less than a cross-sectional size of the recess; 
 wherein the optical filter is received in the groove, the adhesive layer is disposed between the optical filter and the first bottom surface of the groove, thereby connects the optical filter to the first bottom surface; 
 the holder body is square shaped, the lens barrel is cylindrical shaped, an orthogonal projection of the lens barrel on the holder body is in a center region of the second surface, a center of the orthogonal projection of the lens barrel overlaps with a center of the holder body, and the recess is disposed at a corner of the holder body away from the center of the orthogonal projection, and 
 the recess is entirely rectangular shaped and extends diagonally along the first bottom surface, the recess has a first end and a second end opposite to the first end, the first end is closer to the center of the orthogonal projection with respect to the second end, the first end is spaced apart from the orthogonal projection, the air escape hole is disposed at the first end. 
 
     
     
       2. The camera module of  claim 1 , wherein the adhesive layer is further received in the recess besides the air escape hole. 
     
     
       3. The camera module of  claim 1 , further comprising a lens received in the lens barrel. 
     
     
       4. The camera module of  claim 1 , further comprising a circuit board, wherein the lens holder is mounted on the circuit board. 
     
     
       5. The camera module of  claim 4 , further comprising an image sensor, wherein the image sensor is disposed on the circuit board, and the image sensor is also received in the groove and faces the optical filter. 
     
     
       6. The camera module of  claim 1 , wherein the recess is fan-shaped. 
     
     
       7. The lens holder of  claim 1 , wherein the air escape hole is a frustum of a cone, and the cross-sectional size of the air escape hole increases from the second bottom surface to the second surface. 
     
     
       8. An electronic device, comprising:
 a camera module comprising:
 a lens holder, comprising:
 a holder body; and 
 a lens barrel disposed on the holder body; 
 
 an adhesive layer; and 
 an optical filter connected to the holder body through the adhesive layer; 
 wherein the holder body comprises a first surface away from the lens barrel and a second surface opposite to the first surface, the first surface defines a groove, the groove comprises a first bottom surface, the first bottom surface defines a recess, the recess comprises a second bottom surface, the second bottom surface defines an air escape hole; 
 
 wherein a cross-sectional size of the air escape hole is less than a cross-sectional size of the recess; 
 wherein the optical filter is received in the groove, the adhesive layer is disposed between the optical filter and the first bottom surface of the groove, thereby connects the optical filter to the first bottom surface; 
 the holder body is square shaped, the lens barrel is cylindrical shaped, an orthogonal projection of the lens barrel on the holder body is in a center region of the second surface, a center of the orthogonal projection of the lens barrel overlaps with a center of the holder body, and the recess is disposed at a corner of the holder body away from the center of the orthogonal projection, and 
 the recess is entirely rectangular shaped and extends diagonally along the first bottom surface, the recess has a first end and a second end opposite to the first end, the first end is closer to the center of the orthogonal projection with respect to the second end, the first end is spaced apart from the orthogonal projection, the air escape hole is disposed at the first end. 
 
     
     
       9. The electronic device of  claim 8 , wherein the recess is fan-shaped. 
     
     
       10. The electronic device of  claim 8 , wherein the air escape hole is a frustum of a cone, and the cross-sectional size of the air escape hole increases from the second bottom surface to the second surface.